Explosion proof assembly

ABSTRACT

An explosion proof assembly that includes a first portion with a window; an outer touchscreen adhesively sealed around a perimeter of the first portion rear face; and a second portion releasably coupled to the first portion. The second portion has a second portion inner surface defined by a second portion inner edge that transitions into a first dissipation wall. The first portion has a second dissipation wall. The assembly includes a mobile device operable via a mobile device touchscreen. Upon assembly, the outer touchscreen is transmissive to the mobile device touchscreen.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. non-provisional applicationSer. No. 15/798,080, filed Oct. 30, 2017. The entirety of eachapplication is incorporated herein by reference for all purposes.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable.

BACKGROUND Background of the Disclosure

The use of electrical devices in hazardous areas may lead to anincreased risk of a fire or explosion triggered by the presence of theelectrical device. For instance, an electrical device may serve as anignition source in a hazardous area containing flammable gasses, vaporsor dust. For this reason, electrical devices used in hazardous areas areoften required to be certified according to the requirements specifiedin that particular jurisdiction. Further, often the types of protectionsrequired vary depending on the risks and hazards involved.

Hazardous environments have been categorized and regulated, but thespecific classification, regulating, and governing thereof depends onjurisdiction. Electrical codes and standards for hazardous areas aregenerally understood as having two distinct paths. In North America, a‘Class, Division’ system has been utilized, whereas other parts of theworld use a ‘Zone System’ based predominantly on standards from theInternational Eletrochemical Commission (IEC) and European Community forElectrotechnical Standardization (CENELEC). A main difference is in theZone system is that the level of hazard probability is divided intothree ‘zones’ as opposed to two ‘divisions’

The types of hazardous environments are broken down into three classes,with each class focusing on different types of hazardous materials inthe surrounding atmosphere. For instance: Class I areas includeflammable gasses or vapors present in the air in sufficient quantitiesto produce an explosion in the presence of an ignition source; Class IIareas include the presence of combustible dusts; and Class III areasinclude ignitable fibers or other materials too heavy to be suspended inthe air in sufficient quantities to produce an ignitable mixture (e.g.,wood chips, cotton, nylon, etc.).

Two common types of hazardous areas requiring protection for electricaldevices are areas that contain flammable vapors and areas containingdust or other particulates susceptible to ignition. Further, each classis divided into two divisions based on the probability of hazardousmaterials being present in an ignitable or combustible concentration inthe surrounding air. Division 1 defines hazardous environments where thepertinent hazardous material (e.g., vapors, dust, fibers) is presentduring normal conditions. Division 2 defines hazardous environmentswhere the pertinent hazardous material is present only in abnormal orfault conditions (e.g., in the event of a container failure or otherleak).

Regarding Class I hazardous environments involving flammable vapors, anelectrical device may be used in such an area via an explosion proofenclosure or assembly configured to keep an internal explosion withinthe explosion proof enclosure from escaping outward, where it wouldignite vapors outside of the enclosure. Thus, with regard toenvironments having flammable vapors, explosion proof assemblies aredesigned to both reduce the entry of flammable materials into theenclosure and also, in the event of an explosion within the enclosure,to prevent the escape of hot or burning material from escaping theenclosure.

Regarding Class II hazardous environments involving ignitable dusts andparticulates, an electrical device may be used in such an area via adust-ignition proof enclosure or assembly that is configured to preventignitable materials from entering the enclosure and by containing anyarcs, sparks or heat within the enclosure that may ignite dust or otherparticulates in the surrounding environment. Also, there existsassemblies and enclosures for use with an electrical device that arereferred to as “intrinsically safe,” where an intrinsically safeassembly including an electrical device is incapable of releasingsufficient electrical or thermal energy to cause ignition of a specifichazardous substance (i.e., Class I, Class II and Class III substances)under normal or abnormal conditions. Further, “non-incendive” componentsare non-sparking and can be used in Div1, Zone1 areas when coupled withexplosion proof enclosure.

While assemblies or enclosures have been developed for use in hazardousareas, these components are often expensive and not configured for usewith particular electrical devices. Also, these components may onlysatisfy the requirements for a particular class and division, and thusmay not be used in other hazardous environments or in hazardousenvironments under abnormal conditions (i.e., Division 2 conditions).Further, these components may be permanently coupled to the protectedelectrical device, restricting the use of multiple electrical deviceswith the same enclosure. Thus, there is a need in the art for anintrinsically safe or explosion proof assembly and/or enclosure capableof being safely used in varying types of conditions hazardousenvironments. Also, it would be beneficial if such an enclosure was notpermanently coupled to or formed integrally with the protectedelectrical device, allowing the use of different electrical devices withthe same enclosure.

It should be noted that standards differ depending on what part of theworld a user is in. It is desirous to have an explosion proof assemblyfor a mobile device capable of meeting stringent ATEX/IECEx(International Electrotechnical Commission) for zones 1 and 2, inaddition to North America Class 1, Divisions 1 and 2 for safe operationaround hazardous gas, vapor and dust-based atmospheres. This means anysuch assembly should be able to meet the most difficult part of anyspecification, which may be different by way of example each of ATEX,IECEx, and NA.

SUMMARY

Embodiments of the disclosure pertain to an explosion proof enclosurethat may include a first portion that may further have a first portionrear face, a first portion outer edge, a first portion inner edge, asecond dissipation wall, an isolator housing receptacle, a pin housingreceptacle, and a window; an outer touchscreen adhesively sealed arounda perimeter of the first portion rear face; a second portion releasablycoupled to the first portion, the second portion may further have asecond portion inner surface defined by a second portion inner edge thattransitions into a first dissipation wall, an isolator housing, and apin housing.

Other embodiments of the disclosure pertain to an explosion proofassembly that may include a first portion releasably coupleable to asecond portion. The first portion may include any of a first portionrear face, a first portion outer edge, a first portion inner edge, asecond dissipation wall, a pin housing receptacle, and a window. Theremay be an outer touchscreen adhesively sealed around a perimeter of thefirst portion rear face. The second portion may include any of a secondportion inner face, a pin housing, and a second portion inner surfacedefined by a second portion inner edge that transitions into a firstdissipation wall. The second portion may include a third dissipationwall.

Coupling of the portions may form an enclosure. The first portion andthe second portion are releasably coupled to each other to form theenclosure. There may be a mobile device within the enclosure. The mobiledevice may be disposed between the window and the second portion innerface. The mobile device may be operable via a mobile device touchscreen.

The pin housing may mate within the pin housing receptacle. Uponassembly the outer touchscreen may be engaged with the mobile devicetouchscreen and/or the outer touchscreen may be transmissive to themobile device touchscreen.

In aspects, the second dissipation wall may be adjacent to the firstdissipation wall. The second dissipation wall may be adjacent to thethird dissipation wall. The second dissipation wall may be adjacent toeach of the first and third dissipation walls.

The mobile device may have an on-off button. The pin housing may includea movable pin. Upon assembly, the movable pin may be aligned with theon-off button. In aspects, depressing of the movable pin may results indepressing the on-off button.

The first portion may include a plurality of first mating apertures. Thesecond portion may include a plurality of second mating aperturescorresponding to the plurality of first mating apertures. One or more ofany respective first mating aperture and second mating aperture may havea fastener disposed therein. Any respective fastener may be tightened,such as to a torque value in the range of about 3 Newton meter to about7 Newton meter.

The mobile device may be configured for taking photos via a camera lens.The second portion may include a lens window. Upon assembly the cameralens and the lens window may be aligned.

The mobile device may be configured for taking photos via a camera lens.The second portion may include a lens window. Upon assembly the cameralens and the lens window may be aligned. The mobile device may beconfigured for electromagnetic wireless recharging functionality. Thesecond portion may include a second portion window sealingly closed off.

Upon coupling the assembly may be configured to at least partiallydissipate a flame resultant from an explosion of the mobile device.

Other embodiments herein pertain to an explosion proof enclosure havinga mobile device therein, thereby forming an assembly.

The enclosure may include a first portion having any of a first portionrear face, a first portion outer edge, a first portion inner edge, asecond dissipation wall, a pin housing receptacle, and a window. Theremay be an outer touchscreen adhesively sealed around a perimeter of thefirst portion rear face. The enclosure may include a second portionhaving nay of a second portion inner face, a pin housing, a secondportion inner surface defined by a second portion inner edge thattransitions into a first dissipation wall, and a third dissipation wall.

The mobile device may be disposed between the window and the secondportion inner face. The mobile device may be operable via a mobiledevice touchscreen. The first portion and the second portion may bereleasably coupled to each other to form an enclosure.

The second dissipation wall may be adjacent to the first dissipationwall, and/or may be adjacent to the third dissipation wall.

The mobile device may be configured for electromagnetic wirelessrecharging functionality. The second portion may include a secondportion window sealingly closed off.

Still other embodiments of the disclosure pertain to an explosion proofassembly that may include a first portion having any of a first portionrear face, a first portion outer edge, a pin housing receptacle, a firstportion inner edge, a second dissipation wall, and a window. There maybe an outer touchscreen adhesively sealed around a perimeter of thefirst portion rear face.

The second portion may be releasably coupled to the first portion toform an enclosure. The second portion may include any of a pin housing,a second portion inner surface defined by a second portion inner edgethat transitions into a first dissipation wall extending substantiallytherearound, and a third dissipation wall. There may be a mobile devicedisposed within the enclosure. The mobile device may be operable via amobile device touchscreen.

Upon coupling the assembly may be configured to at least partiallydissipate a flame resultant from an explosion of the mobile device priorto any portion of the flame exiting the assembly.

These and other embodiments, features and advantages will be apparent inthe following detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

A full understanding of embodiments disclosed herein is obtained fromthe detailed description of the disclosure presented herein below, andthe accompanying drawings, which are given by way of illustration onlyand are not intended to be limitative of the present embodiments, andwherein:

FIG. 1A shows a front exploded or disassembled view of an embodiment ofan explosion proof tablet assembly according to embodiments of thedisclosure;

FIG. 1B shows a rear exploded or disassembled view of an embodiment ofan explosion proof tablet assembly according to embodiments of thedisclosure;

FIG. 2A shows a front view of the explosion proof tablet assembly ofFIG. 1A in an assembled configuration according to embodiments of thedisclosure;

FIG. 2B shows a back view of the explosion proof table assembly of FIG.1A in an assembled configuration according to embodiments of thedisclosure;

FIG. 3 shows a perspective view of an enclosure of the assembly of FIG.1A in an assembled configuration according to embodiments of thedisclosure;

FIG. 4 shows a front-side zoomed-in view of an enclosure of theexplosion proof table assembly of FIG. 1A according to embodiments ofthe disclosure;

FIG. 5 shows a rear-side zoomed-in view of an enclosure of the explosionproof table assembly of FIG. 1A according to embodiments of thedisclosure;

FIG. 6A shows a front-side exploded view of another embodiment of anexplosion proof tablet assembly according to embodiments of thedisclosure;

FIG. 6B shows a rear-side exploded view of another embodiment of anexplosion proof tablet assembly according to embodiments of thedisclosure;

FIG. 7 shows a zoomed-in view of an enclosure of the explosion prooftable assembly of FIGS. 6A and 6B according to embodiments of thedisclosure;

FIG. 8 shows a zoomed-in view of an enclosure of the explosion prooftable assembly of FIGS. 6A and 6B according to embodiments of thedisclosure;

FIG. 9 shows another embodiment of an explosion proof enclosureaccording to embodiments of the disclosure;

FIG. 10A shows a frontward isometric view an explosion proof assemblyaccording to embodiments of the disclosure;

FIG. 10B shows a frontward isometric component breakout view theassembly of FIG. 10 according to embodiments of the disclosure;

FIG. 10C shows a rearward isometric component breakout view of theassembly of FIG. 10 according to embodiments of the disclosure;

FIG. 10D shows a side cross-sectional view of an unassembled enclosureaccording to embodiments of the disclosure;

FIG. 10E shows a side cross-sectional view of an assembled enclosurehaving a mobile device therein according to embodiments of thedisclosure;

FIG. 10F shows a side view of an input connector of a mobile deviceaccessible through an isolator bore of an explosion proof assemblyaccording to embodiments of the disclosure;

FIG. 11A shows a close-up cross-sectional view of a flame path anassembled enclosure according to embodiments of the disclosure;

FIG. 11B shows a close-up cross-sectional view of a flame in the flamepath of the assembled enclosure of FIG. 11A according to embodiments ofthe disclosure;

FIG. 12 shows a back isometric component breakout view of an explosionproof assembly having a modified second portion according to embodimentsof the disclosure;

FIG. 13A shows a top view of a hand-held accessory releasably coupled toa rear side of an explosion proof assembly according to embodiments ofthe disclosure;

FIG. 13B shows a top view of the hand-held accessory of FIG. 13Aaccording to embodiments of the disclosure;

FIG. 13C shows a side profile view of a user holding the explosion proofassembly of FIG. 13A according to embodiments of the disclosure;

FIG. 14A shows a top view of a magnetic attachment accessory releasablycoupled to a rear side of an explosion proof assembly according toembodiments of the disclosure; and

FIG. 14B shows a side profile view of a user using the explosion proofassembly of FIG. 14A while magnetically attached to a surface accordingto embodiments of the disclosure.

DETAILED DESCRIPTION

Herein disclosed are novel apparatuses, systems, and methods thatpertain to an explosion proof assembly, details of which are describedherein.

Embodiments of the present disclosure are described in detail withreference to the accompanying Figures. In the following discussion andin the claims, the terms “including” and “comprising” are used in anopen-ended fashion, such as to mean, for example, “including, but notlimited to . . . ”. While the disclosure may be described with referenceto relevant apparatuses, systems, and methods, it should be understoodthat the disclosure is not limited to the specific embodiments shown ordescribed. Rather, one skilled in the art will appreciate that a varietyof configurations may be implemented in accordance with embodimentsherein.

Although not necessary, like elements in the various figures may bedenoted by like reference numerals for consistency and ease ofunderstanding. Numerous specific details are set forth in order toprovide a more thorough understanding of the disclosure; however, itwill be apparent to one of ordinary skill in the art that theembodiments disclosed herein may be practiced without these specificdetails. In other instances, well-known features have not been describedin detail to avoid unnecessarily complicating the description.Directional terms, such as “above,” “below,” “upper,” “lower,” “front,”“back,” “right”, “left”, “down”, etc., are used for convenience and torefer to general direction and/or orientation, and are only intended forillustrative purposes only, and not to limit the disclosure.

Connection(s), couplings, or other forms of contact between parts,components, and so forth may include conventional items, such aslubricant, additional sealing materials, such as a gasket betweenflanges, o-rings, PTFE between threads, and the like. The make andmanufacture of any particular component, subcomponent, etc., may be aswould be apparent to one of skill in the art, such as molding, forming,machining, additive manufacturing, etc. Embodiments of the disclosureprovide for one or more components to be new, used, and/or retrofittedto existing machines and systems. One or more components may be madefrom a metallic material, such as stainless steel, aluminum, metalalloy, etc.

The various characteristics mentioned above, as well as other featuresand characteristics described in more detail below, will be readilyapparent to those skilled in the art upon reading the following detaileddescription of the embodiments, and by referring to the accompanyingdrawings.

Terms

The term “connected” as used herein can refer to a connection between arespective component (or subcomponent) and another component (or anothersubcomponent), which can be fixed, movable, direct, indirect, andanalogous to engaged, coupled, disposed, etc., and can be by screw,nut/bolt, weld, and so forth. Any use of any form of the terms“connect”, “engage”, “couple”, “attach”, “mount”, etc. or any other termdescribing an interaction between elements is not meant to limit theinteraction to direct interaction between the elements and may alsoinclude indirect interaction between the elements described.

The term “fluid” as used herein can refer to a liquid or gas and is notsolely related to any particular type of fluid such as hydrocarbons.

The terms “pipe”, “conduit”, “line” or the like as used herein can referto any fluid transmission means, and can be tubular in nature.

The term “combustion” as used herein can refer to an exothermic reactionbetween a fuel and an oxidant that can result in the production of aflame (the visible part of a fire) and a gaseous product.

The term “explosion” as used herein can refer to a combustion in theform of a release of energy in an extreme manner, usually with thegeneration of high temperatures and the release of gases. An explosioncan produce a flame, heat, a shock wave, a pressure wave, or othereffects. An explosion can be referred to as a form of combustion.

The term “flame” as used herein can refer to the visible part of a fire.Flame can refer to a product of a combustion reaction emitting visible,infrared, and sometimes ultraviolet light, the frequency spectrum ofwhich depends on the chemical composition of the burning material andintermediate reaction products.

The term “explosion proof assembly” as used herein can refer to anassembly that can adequately prevent an explosion in an environmentexternal to the assembly as a result of an explosion or ignited firewithin the assembly.

The term “flame extinguishing enclosure” as used herein can refer to anassemblable enclosure that upon proper coupling together provides orotherwise configures the enclosure with a flame path that is suitable toextinguish (or quench, etc.) a flame that results from a combustion,explosion, or other form of ignited fire from within the enclosure. Theterm can be further in reference to accomplishing a desiredconfiguration and result in light of certain industry, standards,specifications, requirements, etc. The term “flame dissipating” can beanalogous to flame extinguishing.

The term “flame path” as used herein can refer to a spatial region ofsome amount of direction and/or distance (linear or non-linear) withinan explosion proof assembly where a flame may traverse. The explosionproof assembly can be configured in a manner to provide a suitable flamepath that ultimately results in the extinguishing of the flame before it(or any part thereof) can leave or otherwise exit the assembly.

The term “transmissive” as used herein can refer to the ability of amaterial to pass a signal therethrough. For example, a touchscreen of anexplosion proof assembly can be transmissive of a signal created byhuman touch thereto to a touchscreen of a mobile device retained withinthe assembly that is in contact with therewith. This can occur, forexample, by changing an electrical property of both the touchscreens,such as resistance or capacitance.

The term “CNC machined” can refer to a computer numerical control (CNC)process whereby a robot or machinist runs computer-operated equipment tocreate machine parts, tools and the like.

The embodiments described herein include an explosion proof assemblythat includes a tablet computer having a touch screen, such as the iPad®or iPhone produced by Apple, Inc. Particularly, the explosion proofassembly includes a tablet computer or phone disposed within a removablycoupled enclosure. The enclosure allows for the use of the tabletcomputer or phone in hazardous areas including flammable vapors andignitable dust, corresponding to Class 1 Div2 Class II Div 2, Class 1Div I, Class 2 Div I, Zone2, Zone22, Zone1 and Zone21 areas. Also, theenclosure allows for the use of the tablet or phone in hazardous areasduring Zone/Division 1, 2 conditions. Further, the assembly isconfigured to be non-incendive such that the assembly does not allow forthe release of any sparks or electrical/thermal energy sufficient tocause ignition of hazardous substances in the surrounding environment.

In an embodiment, a non-incentive, non-modified tablet computer or phone(e.g., iPad2, iPad3, etc.) with an accompanying enclosure is providedthat allows a user to operate the tablet in hazardous environments,including Class I/Division 2, Class II/Division 2, Class I/Division 1,Class II/Division 1, ATEX Zone 2, Zone 1 and IECEx classified areas.

Referring initially to FIGS. 1A-1B, an explosion proof assembly 10 isshown in an exploded or disassembled configuration and generallyincludes a tablet computer or phone 100 and an enclosure 200 having afirst or upper portion 300 that is releasably coupled to a second orlower portion 400. In this embodiment, tablet 100 is an iPad® producedby Apple, Inc. However, in other embodiments tablet 100 may compriseother varying types and styles of tablet computers or phones, includingbut not limited to those from other manufacturers. In this embodiment,enclosure 200 is formed from milled aluminum satisfying the NEMA 4standard.

However, in other embodiments enclosure 200 may be formed from otherrugged materials. Tablet 100 has a flat front face 101 defined by afront outer edge 103, which includes a touch screen 102. Tablet 100 alsoincludes a flat rear face 105 that is defined by a rear outer edge 107.Extending between front outer edge 103 and rear outer edge 107 is achamfered surface 109 having four chamfered corners 111. Tablet 100 alsoincludes a first button 104 (home button) disposed on front face 101, acamera lens 106 disposed on rear face 105 and a second button 108(on/off button) disposed on chamfered edge 109. An input connector 110is disposed on chamfered surface 109. Input connector 110 is configuredto allow for data and/or electrical power transfer between tablet 100and an external electrical device.

Referring now to FIGS. 1A-1B and 2A-2B, while FIGS. 1A-1B show assembly10 in an exploded or disassembled configuration, FIGS. 2A-2B showassembly 10 in a closed or assembled configuration where there is nowiring or other conductor exposed to the surrounding environment.Regarding enclosure 200, first portion 300 includes a flat front face301 having a central window 302 extending therethrough that is definedby an outer edge 303. Extending from face 301 is a curved outer surface305 that extends around face 301. A first aperture 304 and a secondaperture 306 are also disposed on front face 301 and extendtherethrough. Thus, first aperture 304 provides a means for actuatingfirst button 104 disposed on front face 101 of tablet 100. Also, secondaperture 306 provides a window for a front cameral 12 (FIG. 2A) oftablet 100, that may be disposed on front face 101 of tablet 100.

First portion 300 also includes a flat rear face 307 (FIG. 1B) disposedopposite of front face 301 and having a sealing surface 308 that extendsfrom face 307. Sealing surface 308 extends between an outer edge 309 andthe outer edge 303 of window 302. Surface 308 is configured to sealinglyengage the front face 101 of tablet 100 so as to prevent or at leastsubstantially restrict fluids or particles (e.g., dust, particulates,fibers, etc.) from entering or exiting enclosure 200 when assembly 10 isin its assembled configuration (FIGS. 2A-2B). Sealing surface 308 alsoincludes a first portion 308 a that extends about first aperture 304 anda second portion 308 b that extends about second aperture 306. Extendingfrom curved surface 305 is a sealing mechanism 320, which is configuredto seal against a corresponding sealing assembly 420 of second portion400 when first portion 300 and second portion 400 are coupled to eachother.

Second portion 400 includes an inner flat face 401 defined by arectangular outer edge 402. Extending from edge 402 of face 401 is aninner chamfered surface 403 extending about inner face 401 and havingfour chamfered corners 405. Portion 400 also includes a flat outer face411 defined by an outer edge 404. Extending from edge 404 is an outerchamfered surface 407 that extends about outer face 411 and has fourchamfered corners 409. Sealing mechanism 420 is disposed between innerchamfered surface 403 and outer chamfered surface 407.

A ledge 408 extends from chamfered outer surface 407 and includes anaperture 410, allowing access to actuate second button 108 of tablet100. Referring briefly to FIG. 3, enclosure 200 in the assembledconfiguration includes an internal chamber 440 disposed between firstsection 300 and second section 400. Sealing assemblies 320, 420, andsealing surface 308 of portion 300 are configured to seal internalchamber 440 from the external environment once tablet 100 has beendisposed in chamber 440, as shown in FIGS. 2A-2B.

Referring now to FIGS. 4 and 5, sealing mechanism 320 of first portion300 includes an inner surface 321 that extends from an outer edge 322 ofcurved surface 305. Mechanism 320 also includes a tab 323 that extendsinward (relative to second portion 400) from surface 321. Tab 323includes four rounded corners 323 a and has a vertical inner surface 324and an oppositely disposed vertical outer surface 325. Correspondingly,sealing mechanism 420 of second portion 400 includes an inner surface421 that extends from an outer edge 422 of chamfered surface 407.Mechanism 420 also includes a tab 423 that extends inward (relative tofirst portion 300) from surface 421. Tab 423 includes four roundedcorners 423 a and has a vertical inner surface 424 and an oppositelydisposed vertical outer surface 425.

When assembly 10 is in the assembled configuration, as shown in FIGS.2A-2B, outer surface 325 of tab 323 is configured to sealingly engageinner surface 424 of tab 423, thus preventing or at least substantiallyrestricting fluids or particles (e.g., dust, particulates, fibers, etc.)from entering or exiting enclosure 200 when assembly 10 is in itsassembled configuration. First portion 300 and second portion 400 may bereleasably coupled to each other by mechanical means, such as evenlydistributed bolts or screws extending through curved surface 305 offirst portion 300 and chamfered surface 407 of second portion 400. Anadhesive or other substance may also be disposed on either surface 321of portion 300 or on surface 421 of portion 400, thus causing portions300 and 400 to adhere to each other upon assemblage.

Referring now to FIGS. 6A and 6B, another embodiment includes anexplosion proof assembly 20 that generally includes tablet 100 and anenclosure 500 having a first portion 600 and a second portion 700.Enclosure 500 includes similar features as enclosure 200 and thusidentical features are numbered similarly. In this embodiment, enclosure500 is formed from milled aluminum satisfying the NEMA 4 standard.However, in other embodiments enclosure 500 may be formed from otherrugged materials. As with assembly 10, when assembly 20 is in theassembled configuration there is no wiring or other conductor exposed tothe surrounding environment, as will be explained further herein. Inthis embodiment, second portion 600 includes a data and/or recharginginterface 740 coupled to inner face 401 and outer face 411 of portion600.

Referring now to FIGS. 7 and 8, data interface 740 generally includes acable 742 having a first end 742 a coupled to a first connector 744 anda second terminal end 742 b coupled to a second connector 750. Firstconnector 744 is a 30-pin dock connector configured to electricallycouple with input connector 110 of tablet 100 (FIGS. 5A and 5B). Secondconnector 750 is a universal serial bus (mini-USB) connection porthaving an opening 752 disposed on surface 411, which is coupled tosecond portion 400 by two screws 751 extending into surface 401. Thus,when assembly 20 is in an assembled configuration (similar to theassembled configuration of assembly 10 shown in FIGS. 2A-2B), connector744 is coupled to input 110, establishing an electrical connectionbetween tablet 110 and USB port 750, which may be accessed by anexternal cable. A dust cap 753 is disposed on surface 411 and is coupledto surface 411 via a flange 754 and screw 755 that extends throughflange 754 and into surface 411 of portion 400. A cap portion 756 isdisposed directly over opening 752 to prevent dust, fibers and othermatter from contacting any pins or other electrical connectors withinopening 752 of port 750. In order to access opening 752 of port 750, cap753 may be rotated about screw 755, such as to expose opening 752 toallow for the insertion of a male connector (FIG. 7 shows cap 753 in thecovered position).

Referring now to FIG. 9, another embodiment includes an enclosure 250configured for use in an explosion proof assembly (e.g., assembly 10).Enclosure 250 includes similar features as enclosure 200 and thusidentical numerals are numbered similarly. Enclosure 250 includes afirst portion 350 and a second portion 450, where portions 350 and 450are configured to releasably couple to each other via a plurality ofscrews 454 Inner surface 321 of first portion 350 and chamfered surface407 of second portion 450 each include an evenly distributed pluralityof apertures 352, 452, respectively, for receiving the plurality ofscrews 454.

Referring to FIGS. 1-5, a method of forming explosion proof assembly 10generally includes placing or disposing tablet 100 within the secondportion 400 of enclosure 200 and sealing tablet 100 within enclosure 200by coupling first portion 300 with second portion 400. Once coupled,assembly 10 is in the assembled configuration such that assembly 10satisfies the requirements of Class I, Division 2 and Class II, Division2 hazardous area classifications. Also, touch screen 102 of tablet 100may be safely actuated within Class I, Division 2 and Class II, Division2 hazardous areas without violating the safety requirements of theseareas. In other words, the assembly 10 includes an explosion-proofsealing or compartment for the enclosed tablet.

In the embodiment of FIGS. 1-5, placing tablet 100 within second portion400 includes disposing tablet 100 such that the flat rear face 105 oftablet 100 is aligned with and/or engages the inner flat face 401 ofsecond portion 401 of second portion 400. Also, chamfered surface 109and corners 111 of tablet 100 are aligned with and/or engage chamferedsurface 403 and corners 405 of portion 400. Coupling first portion 300with second portion 400 of enclosure 200 includes aligning and engagingthe sealing mechanism 320 of portion 300 with the sealing mechanism 420of second portion 400, such that inner surface 321 engages inner surface421 and outer surface 325 of tab 323 engages surface 424 of tab 423.

In the embodiment shown in FIG. 9, coupling the first portion 300 to thesecond portion 400 further includes extending the plurality of screws454 through the plurality of apertures 352 and 452. However, in otherembodiments coupling portions 300 and 400 may include disposing anadhesive on one or more of the surfaces of either sealing mechanism 320,420, respectively. In this embodiment, engagement between mechanisms 320and 420 of enclosure 200 creates a seal satisfying the IP67 standard.However, in other embodiments the seal may satisfy other standards suchas IP68 or IP65, etc. In some embodiments, an explosion-proof sealing orcompartment is provided thereby.

Referring now to FIGS. 6A-8, a method of forming explosion proofassembly 20 generally includes placing or disposing tablet 100 withinthe second portion 700 of enclosure 500 and sealing tablet withinenclosure 500 by coupling first portion 600 with second portion 700. Aswith assembly 10, once coupled assembly 20 is in the assembledconfiguration and thus satisfies the requirements of Class I, Division 2and Class II, Division 2 hazardous area classifications. Also, touchscreen 102 of tablet 100 may be safely actuated within Class I, Division2 and Class II, Division 2 hazardous areas without violating the safetyrequirements of these areas. Tablet 100 is disposed within portion 700in a similar fashion to how tablet 100 is disposed within portion 400.However, in the embodiment of assembly 20, disposing tablet 100 withinportion 700 further includes coupling connector 110 of tablet 100 withinterface 740 of portion 700. Specifically, coupling connector 110 withinterface 740 includes coupling connector 110 with first connector 744of interface 740. Once coupled, an electrical signal may be communicatedbetween tablet 100 and port 750.

As with enclosure 200 of assembly 10, portions 600 and 700 of assembly20 are coupled in a similar fashion as portions 300 and 400 are coupledto form assembly 10 (e.g., sealing mechanisms 320, 420, respectively, ofportions 600 and 700 are engaged with each other). Portions 600 and 700may also be coupled via a plurality of screws (e.g., screws 454) thatextend through apertures (e.g., apertures 352, 452) disposed in portions600 and 700. In this embodiment, engagement between mechanisms 320 and420 of enclosure 500 creates a seal satisfying the IP65 standard.However, in other embodiments the seal may satisfy other standards suchas IP68 or IP65, etc.

Once assembly 20 is in the assembled configuration an electrical signalmay be communicated between an external electrical device and tablet100. A method for communicating a signal between an external device andtablet 100 includes rotating cap portion 756 of dust cap 753 about screw755 such that opening 752 is exposed. Once opening 752 is exposed, aconnector of the external device or conduit is coupled to port 750 ofinterface 740 such that an electrical signal may be communicated betweentablet 100 and the external device or conduit. In this manner, tablet100 may be safely recharged within enclosure 500 while assembly 20 is ina hazardous area (e.g., Class I, Division 2 and Class II, Division 2areas).

Referring now to FIGS. 10A, 10B, 10C, 10D, 10E, and 10F together, afront isometric assembled view, a front isometric component breakoutview, a back isometric component breakout view, an unassembled lateralcross-sectional view, an assembled lateral cross-sectional view, and aside view of an accessible input connector of a mobile device,respectively, of an explosion proof assembly, in accordance withembodiments disclosed herein, are shown.

As illustrated, explosion proof assembly 1000 may include a mobiledevice 1100 associated with a flame extinguishing enclosure 1200. Theenclosure 1200 may include a first or upper portion 1300 configured forreleasable coupling to a second or lower portion 1400. In aspects, themobile device 1100 may be an iPad® or iPhone® produced by Apple, Inc.,including the recent iPhone 8. However, the mobile device 1100 is notmeant to be limited, and include other varying types and styles ofcomputer-related devices, including but not limited to those from othermanufacturers.

Embodiments herein provide for an explosion proof assembly 1000configured to pass a ‘resistance to impact’ test in accordance with IEC60079-0 (see Section 26.4.2 describing a drop-ball test). In thedrop-ball test, an object, usually a ball of 1 kg mass, is dropped froma range of 0.2 m to 0.4 m. Accordingly, outer touchscreen 1302 must beconfigured to withstand the impact of the dropped ball without effectingthe ability of assembly 1000 to be ‘explosion proof’.

“Explosion proof” as referenced to the assembly 1000 may refer to theenclosure 1200, when assembled, being able to contain any explosionoriginating therein. The enclosure 1200, when assembled, may beconfigured and able to completely extinguish a flame generated fromtherein, such as from an explosion or other similar failure of mobiledevice 1100.

Enclosure 1200 may be formed from milled aluminum satisfying the NEMA 4standard. However, in other embodiments enclosure 1200 may be formedfrom other rugged materials. Of significance, the explosion proofassembly 1000 may be configured for use in hazardous areas, including:North America Class I, Division 1; Class I, Division 2; Class II,Division 2 areas; and Class II, Division 1, and non-US Zone 2 and 1 ATEXand IECEx classified areas. As would be apparent to one of skill in theart, in order to certified by these bodies for satisfactory use withinsuch a setting, various requirements must be met.

Standards pertain to impact, dropping, thermal conditioning (orendurance), thermal shock, temperature requirements, explosive pressure,overpressure, torque test, and so forth.

FIGS. 10B and 10C together show assembly 1000 in a breakout view, whileFIG. 10A shows assembly 1000 in a closed or assembled configurationwhere there is no wiring or other conductor exposed to the surroundingenvironment. When assembled the assembly 1000 may be configured for usein Class I, Division 1; Class I, Division 2; Class II, Division 2 areas;and Class II, Division 1, and non-US Zone 2 and 1 ATEX and IECExclassified areas.

The assembly 1000 may be configured for use in the setting when theupper portion 1300 is sealingly coupled with the lowered portion 1400,with the mobile device 1100 disposed therein. ‘Sealingly coupled’ mayinclude the portions 1300, 1400 being sealingly engaged to certainspecification, but some amount of disconnect is permissible. In thissense ‘sealing’ may refer to a metal-to-metal seal.

Regarding the enclosure 1200, the first portion 1300 may include a frontface 1301. The first portion 1300 may include a rear face 1307 disposedopposite of front face 1301. The rear face 1307 may provide a suitablesurface for sealing between the rear face 1307 and an outer touchscreen1302. The surface for sealing may extend between an inner edge 1303 anda rear face inner edge 1303 a, and therearound the rear face 1307. Aswould be apparent the first portion 1300 may thus have its ‘window’ (oropening) closed off by the presence of the outer touchscreen 1302.

The outer touchscreen 1302 may be a thin, flat piece of rigid anddurable material suitable to meet various specifications identifiedherein. One of skill in the art would appreciate the outer touchscreen1302 may be configured to withstand the aforementioned drop-ball test.Accordingly, the outer touchscreen 1302 may have a thickness T1 in therange of about 0.5 mm to about 1.2 mm. The thickness T1 may depend onthe size of the touchscreen 1302, which may further depend on theparticular mobile device desired for use.

The second portion 1400 may include a second portion inner face 1401.The inner face 1401 may be bordered by a second portion outer edge 1402.There may be an inner chamfered surface 1403 extending around the outeredge 1402. The inner surfaces of the second portion 1400 may be machinedin a manner to accommodate to specification a particular mobile device.In this respect, chamfered or rounded surfaces may instead be linear.

The second portion 1400 may include a second portion rear outer face1411. The rear outer face 1411 may be generally flat. The second portion1400 may include one or more chamfered corners 1405, which may beconfigured to coincide with any respective chamfered corners of thefirst portion 1300 (as well as chamfered corners 1011 of the mobiledevice 1100).

The outer touchscreen 1302 may have a planar underside 1302 a configuredfor complete transmissive mating and engagement with the touchscreen1002 via contact point (or interface, layer, etc.) 1503. In this respectthe assembly 1000 may provide the synergistic effect of being able toisolate effects of any internal explosion from the surroundingenvironment, and yet a user can still access and operate the touchscreeninterface (and buttons 1004, 1008) of the mobile device 1100. One ofskill would appreciate the contact point 1503 may be refer to a suitableamount of contact between the surface of the touchscreen 1002 and theouter touchscreen 1302, whereby the mobile device is accessibly operablevia interfacing with the outer touchscreen.

The front face 1301 may have an outer perimeter surface edge 1309 thatmay extend at around the face 1301 and to the rear face 1307.

Referring particularly to the enclosure 1200 as shown in FIGS. 10C and10D, the first portion 1300 may include the front face 1301, and therear face 1307 disposed opposite of the front face 1301. The rear face1307 may provide a suitable surface for sealing between the rear face1307 and the outer touchscreen 1302. The surface for sealing may extendbetween an inner edge 1303 and the rear face inner edge 1303 a, andtherearound the rear face 1307.

As illustrated, the outer touchscreen 1302 may be adhesively andsealingly connected with the first portion 1300, such as via a layer ofan adhesive 1500. The layer of adhesive 1500 may provide for a completeperimeter seal between the outer touchscreen 1302 and the first portion1300. The adhesive may be suitable to withstand changes of significancein temperature, or chemicals, both from internal and external to theenclosure 1200.

The sealing engagement between the outer touchscreen 1302 and the firstportion 1300 may be beneficial to so as to prevent or at leastsubstantially restrict fluids or particles (e.g., dust, particulates,fibers, etc.) from entering or exiting the enclosure 1200 when theassembly 1000 is in its assembled configuration (e.g., FIG. 10A).

The second portion 1400 may include a second portion inner face 1401.The inner face 1401 may be bordered by a second portion outer edge 1402.There may be an inner chamfered surface 1403 extending around the outeredge 1402.

The second portion 1400 may include a second portion rear outer face1411. The rear outer face 1411 may be generally flat. The inner face1401 may trail off into a surface forming the first dissipation wall1417, which may extend outward and upward from edge 1402, including inan arcuate manner, into proximate engagement with the outer touchscreen1302. As shown, the first dissipation wall 1417 may be the first(lateral) contact point of any flame resulting from failure of themobile device 1100.

The first portion 1300 may similarly have a second dissipation wall1317. In the event of any remnant flame moving past the firstdissipation wall 1417, the flame will be resisted from passing anyfurther beyond the second dissipation wall 1317. As a further measure ofadded redundancy, the second portion may have a third dissipation wall1418. One of skill would appreciate the first portion 1300 may have agrooved surface or region to accommodate mating with the firstdissipation wall 1417 and the third dissipation wall 1418. And similarlythe second portion 1400 may have a grooved surface or region toaccommodate mating with the second dissipation wall 1318.

Referring again to FIGS. 10A-10F together, the surface edge 1309 of thefirst portion 1300 may be flat, planar, rounded, or any suitable shape,and is not meant to be limited. The surface edge 1309 may have one ormore bumper mating holes 1313, whereby a respective bumper 1012 may becoupled therewith (via bumper couplers 1013, which may be screws).Accordingly, one or more bumpers 1012 (only one shown here) may becoupled to the enclosure 1200.

The bumper 1012 may be of a material suitable for providing extraprotection to the mobile device 1100, particularly for shock absorptionin the case of inadvertent dropping of the assembly 1000. Although notlimited, the bumper 1012 may be made of rubber, plastic, silicone, orother comparable material. Moreover, although the Figures may illustrateone or more corner bumpers, the bumper 1012 could have other shapes,including being disposed around the entire perimeter (or in addition oralternatively to other portions) of the assembled enclosure 1200.

Of significance, the mating faces—namely rear face 1307 (includingrespective undulations, edges, and so forth) and inner surfaces 1401,1402, 1403 (including respective undulations, edges, and so forth)—maybe configured for sealing engagement therebetween. The sealingengagement may be metal-to-metal. In order to facilitate the flameextinguishing characteristic of the enclosure 1200, it is desirous tohave significantly reduced separation between the corresponding matingsurfaces of the first portion 1300 and the second portion 1400.

Any or both of the first portion 1300 and the second portion 1400 may bemade from CNC machining.

In this respect, when the first portion 1300 and the second portion 1400are coupled together, the distance between any respective and proximatesurface of the portions 1300, 1400 may be less than about 0.05 inches.In aspects, the gap at any particular proximate contact point may be inthe range of about 0.01 inches to about 0.05 inches. The use of anextremely tight or close tolerance seal around the portions 1300, 1400is of significance in meeting specification for a certified explosionproof assembly.

The first portion 1300 may have one or more first mating apertures 1310.The first mating apertures 1310 may be configured for receivingrespective fasteners 1511. In aspects, the fasteners 1511 may bescrew-type fasteners. As a non-limiting example, the fasteners 1511 maybe A2 Stainless M5×0.8×8 mm Torx head screws. The fasteners 1511 may beinsertable through respective second portion apertures 1408. Althoughshown as being insertable through the second portion 1400 andthreadingly into apertures of the first portion 1300, this configurationcould just as well be reversed.

Although not limited to any particular arrangement or number, there maybe sufficient placement and use of fasteners 1511 to promote orotherwise contribute to the desired tolerance fit between the firstportion 1300 and the second portion 1400. The fasteners 1511 may betightened to a fastener torque value in the range of about 3 N·m toabout 8 N·m. In aspects, the fastener torque value may be at least 5N·m. The fastener torque value may be in the range of about 5 N·m toabout 6 N·m.

Mobile device 1100 may have a front face 1001 that may further include afront outer edge 1003, as well as an operable touch screen 1002. Themobile device 1100 may include a rear face 1005 that may be defined by arear outer edge 1007. There may be a chamfered surface or edge 1009,which may extend between the outer edge 1003 and the rear outer edge1007. In aspects, there may be one or more chamfered corners 1011.

The mobile device 1100 may include a first button 1004 (which may be a‘home’ button or switch as would be understood by one of skill in theart) disposed on the front face 1001. There may be other buttons thatprovide various functionality based on user interaction, such as and asecond button 1008 (which may be an ‘on/off’ button or switch as wouldbe understood by one of skill in the art). The second button 1008 may bedisposed on chamfered surface 1009. In accordance with embodimentsherein the first button 1004 and the second button 1008 may becompletely accessible and actuatable when the portions 1300, 1400 arecoupled together.

The mobile device 1100 may include a camera lens 1006 (associated withrespective camera circuitry), which may be disposed on the rear face1005. In accordance with embodiments herein the camera function of themobile device 1100, including being able to take pictures via lens 1006,may be completely accessible and actuatable when the portions 1300, 1400are coupled together. The lens 1006 may align with outer lens window1406. The outer lens window may be configured to meet or exceedspecification for the explosion proof assembly 1000.

The mobile device 1100 may include an input connector 1010. The inputconnector 1010 may be configured to allow for data and/or electricalpower transfer between mobile device 1100 and any external electricaldevice, such as a power charger (including respective cord andconnector—not shown here). In accordance with embodiments herein theinput connector 1010 may be completely isolated from the externalenvironment of the assembly 1000 when the portions 1300, 1400 arecoupled together. Still, the input connector 1010 may be completelyaccessible when the portions 1300, 1400 are coupled together.

The difference in isolation or accessibility to the input connector 1010may be as a result of the presence of an isolator member 1513. In thisrespect the assembled enclosure 1200 may provide the ability for a userto gain access to the input connector 1010 without having to resort todisassembly. Although not meant to be limited to any particular type ofisolation/access configuration, the Figures show the lower portion 1400may have a generally block- or cubical-shaped isolator housing 1414,with an isolator bore 1415.

The housing 1414 may be configured for mating into a housing receptacle1313 formed in the first portion 1300. The isolator bore 1415 may beconfigured with threads for a threaded engagement with respectivethreads of the isolator member 1513. In embodiments, the isolator member1513 may be a screw.

The threaded engagement may have a suitable tolerance for sufficientprevention of a flame traveling therethrough. In embodiments, theisolator member 1513 may be tightened within the bore 1415 to a torquevalue in the range of about 15 Newton Meters (“N·m”) to about 25 N·m.The torque value may be at least 20 N·m. The isolator member 1513 mayhave a raised head configured for easy tool access, such as via wrench,allen wrench, or other type of feature suitable for a tool to providethe requisite torque value to the tightened isolator member 1513. Inother embodiments, the enclosure 1200 may have a non-torqueconfiguration. For example, the isolator member 1513 may beself-locking.

There may be a gasket 1514 and a gasket plate 1515 configured to providesealing engagement with the enclosure 1200 in the proximity of thehousing 1414 and the receptacle 1313. This configuration may be able tofurther prevent or at least substantially restrict fluids or particles(e.g., dust, particulates, fibers, etc.) from entering or exitingenclosure 1200 via bore 1415 when the enclosure 1200 is assembled. Forconvenience there may be a retention member 1516 configured to retainthe isolator member 1513 with the assembly 1000. The retention member1516 may be a chain link having one end connected to the isolator member1513, and an other end connected to part of the assembly 1000, such asthe second portion 1400 or the gasket plate 1515. There may be a washer1517 for sealing between the head 1513 a and the gasket plate 1515. Thegasket plate 1515 may be coupled to the enclosure 1200 via one or moregasket fasteners 1518 inserted into respective gasket fastener apertures1519. In aspects, the gasket fasteners 1518 may be threadingly engagedinto the apertures 1519.

One of skill would appreciate that enclosure 1200 could be configured toswap the housing 1414 into the first portion 1300, and the receptacle1313 into the second portion 1400.

In accordance with embodiments herein the second button 1008 may becompletely isolated from the external environment of the assembly 1000when the portions 1300, 1400 are coupled together. Still, the secondbutton 1008 may be completely accessible when the portions 1300, 1400are coupled together.

The difference in isolation but yet accessibility to the second button1008 may be as a result of the presence of a sealed depressible pin1407. The pin 1407 may be biased, such as via spring or other suitablemanner, whereby when a top 1407 a of the pin 1407 is depressed, it willsubsequently depress a bottom 1407 b of the pin 1407 against the secondbutton 1008; however, when the pin 1407 is released, the pin 1407releases from depression of the second button 1008.

The pin 1407 may be sealingly disposed within a pin bore 1409. In thisrespect the assembled enclosure 1200 may provide the ability for a userto gain access to or otherwise actuate the second button 1008 withouthaving to resort to disassembly, and still maintain desired isolationfrom the surrounding environment. Although not meant to be limited toany particular type of isolation/access configuration, the Figures showthe second portion 1400 may have a generally block- or cubical-shapedpin housing 1416, with the pin bore 1409.

The pin housing 1416 may be configured for mating into a pin housingreceptacle 1312 formed in the first portion 1300. One of skill wouldappreciate that enclosure 1200 could be configured to swap the pinhousing 1416 into the first portion 1300, and the pin housing receptacle1312 into the second portion 1400. If an explosion occurs within theenclosure 1200, the pin 1407 may will be pushed (urged) against pinhousing 1416 to prevent any flame to pass through 1416.

Referring now to FIGS. 11A and 11B together, a zoom-in cross-sectionalview of a flame path, and a zoom-in cross-sectional view of a flame pathwith a flame therein, of an explosion proof assembly, in accordance withembodiments disclosed herein, are shown.

As should be readily apparent, FIGS. 11A and 11B may not be to scale.Instead, the Figures are intended to illustrate that upon zoom-ininspection, various passageways, gaps, and interstices may be presentwhen the enclosure 1200 is assembled together (i.e., first portion 1300and second portion 1400 are coupled together). For example, there may bea gap 1512 having a distance of less than about 0.04 inches (1000microns) between various contact points of the first portion 1300 andthe second portion 1400.

Although theoretically this could result in passage of, for example,gaseous material, air, and so forth, one of the key attributes of theassembled enclosure 1200 is the ability to dissipate a flame.

Regarding the enclosure 1200, the first portion 1300 may include a frontface 1301. The first portion 1300 may include a rear face 1307 disposedopposite of front face 1301. The rear face 1307 may provide a suitablesurface for sealing between the rear face 1307 and an outer touchscreen1302. The surface for sealing may extend between an inner edge 1303 anda rear face inner edge 1303 a, and therearound the rear face 1307.

The outer touchscreen 1302 may be adhesively and sealingly connectedwith the first portion 1300, such as via a layer of an adhesive 1500.The layer of adhesive 1500 may provide for a complete perimeter sealbetween the outer touchscreen 1302 and the first portion 1300. Theadhesive may be suitable to withstand changes of significance intemperature, or chemicals, both from internal and external to theenclosure 1200.

The sealing engagement between the outer touchscreen 1302 and the firstportion 1300 may be beneficial to so as to prevent or at leastsubstantially restrict fluids or particles (e.g., dust, particulates,fibers, etc.) from entering or exiting the enclosure 1200 when theassembly 1000 is in its assembled configuration (e.g., FIG. 10A). Thesealing may further prevent any flame path between portion 1300 and theouter touchscreen 1302.

The second portion 1400 may include a second portion inner face 1401.The inner face 1401 may be bordered by a second portion outer edge.There may be an inner chamfered surface 1403 extending around the outeredge.

The second portion 1400 may include a second portion rear outer face1411. The rear outer face 1411 may be generally flat. The inner face1401 may trail off into a surface forming the first dissipation wall1417, which may extend outward and upward from edge 1402, including inan arcuate manner, into proximate engagement with the outer touchscreen1302. As shown, the first dissipation wall 1417 may be the first(lateral) contact point of any flame resulting from failure of themobile device 1100.

The first portion 1300 may similarly have a second dissipation wall1317. In the event of any remnant flame moving past the firstdissipation wall 1417, the flame will be resisted from passing anyfurther beyond the second dissipation wall 1317. Still, as a furthermeasure of added redundancy, the second portion may have a thirddissipation wall 1418. One of skill would appreciate the first portion1300 may have a grooved surface or region to accommodate mating with thefirst dissipation wall 1417 and the third dissipation wall 1418. Andsimilarly the second portion 1400 may have a grooved surface or regionto accommodate mating with the second dissipation wall 1318. To thenaked eye the first portion 1300 and second portion 1400 may fitseamlessly together.

Referring specifically to FIG. 11B, the first portion 1300 and thesecond portion 1400 may be configured for assembly together whereby aflame extinguishing (or quenching) path 1509 may be formed. Theextinguishing path 1509 may be likened to a path of least resistance.That is, in the event of an explosion within the enclosure 1200, theresultant flame 1510 travels therein. Like any joint, where the firstportion 1300 and second 1400 are coupled together may be the path offlame travel.

To meet various standards, such as the more stringent requirements forClass 1 Div I or Zone 1, the enclosure 1200 is required to be able towithstand the effects of an internal combustion or explosion that mayproduce a flame, which could in turn be an ignition source for variousmaterials that may be associated with the Class 1 Div I or Zone 1.

It has been discovered that the flame 1510 (or its energy) may beextinguished or otherwise dissipated by the presence of one or moreflame barriers or dissipation walls 1417, 1317, 1418.

Referring now to FIG. 12, a back isometric component breakout view of anexplosion proof assembly having a modified second portion, in accordancewith embodiments disclosed herein, in shown.

While it need not be exactly the same, an assembly 2000 may be like thatof assembly of FIGS. 10A-10F, and components thereof may be duplicate oranalogous. Thus, only a brief discussion of the assembly 2000 isprovided, recognizing that differences, if any, would be discernable byone of skill in the art, especially in view of the present disclosure.

As illustrated, explosion proof assembly 2000 may include a mobiledevice 2100 associated with a flame extinguishing enclosure 2200. Theenclosure 2200 may include a first or upper portion 2300 configured forreleasable coupling to a second or lower portion 2400. In aspects, themobile device 2100 may be an iPad® or iPhone® produced by Apple, Inc.,including the recent iPhone 8. However, the mobile device 2100 is notmeant to be limited, and include other varying types and styles ofcomputer-related devices, including but not limited to those from othermanufacturers.

In the case of the new iPhone 8, and comparable, the enclosure 2200 mayinclude a rear window 2318. The use of the rear window 2318 may aid toprevent or mitigate interference with any electromagnetic “wireless”recharging functionality of the mobile device 2100. Accordingly, thesecond portion 2400 may have an opening 2419 configured to receive therear window 2318.

The assembly 2000 may be configured for use in the setting when theupper portion 2300 is sealingly coupled with the lowered portion 2400,with the mobile device 2100 disposed therein. ‘Sealingly coupled’ mayinclude the portions 2300, 2400 being sealingly engaged to certainspecification, but some amount of disconnect is permissible. In thissense ‘sealing’ may refer to a metal-to-metal seal.

Although not limited, the rear window 2318 may be adhesively andsealingly connected with the second portion 2400, such as via a layer ofan adhesive (not viewable here). The layer of adhesive may provide for acomplete perimeter seal between the rear window 2318 and the secondportion 2400. The adhesive may be suitable to withstand changes ofsignificance in temperature, or chemicals, both from internal andexternal to the enclosure 2200.

Referring now to FIGS. 13A, 13B, and 13C together, a top view of ahand-held accessory releasably coupled to a rear side of an explosionproof assembly, a top view of the hand-held accessory of FIG. 13A, and aside view of a user holding the explosion proof assembly of FIG. 13A,respectively, in accordance with embodiments disclosed herein, areshown.

While it need not be exactly the same, an assembly 3000 may be like thatof assembly of FIGS. 10A-10F, 12, etc., and components thereof may beduplicate or analogous. Thus, only a brief discussion of the assembly3000 is provided, recognizing that differences, if any, would bediscernable by one of skill in the art, especially in view of thepresent disclosure.

As illustrated, explosion proof assembly 3000 may include a mobiledevice (not shown here) associated with a flame extinguishing enclosure3200. The enclosure 3200 may include a first or upper portion 3300configured for releasable coupling to a second or lower portion 3400. Inaspects, the mobile device 2100 may be an iPad® or iPhone® produced byApple, Inc.,

The assembly 3000 may be configured for use in the setting when theupper portion 3300 is sealingly coupled with the lowered portion 3400,with the mobile device disposed therein. ‘Sealingly coupled’ may includethe portions 3300, 3400 being sealingly engaged to certainspecification, but some amount of disconnect is permissible. In thissense ‘sealing’ may refer to a metal-to-metal seal.

To aid in use of the assembly 3000, various accessories may be utilized,including those that provide additional grip, shock absorption,hand-holding, and the like. As shown in FIGS. 13A-13C, an attachablehand-holding accessory 3520 may be coupled to the assembly, such as tothe rear side 3411 of the second portion 3400.

Although not limited to any particular hand-holding accessoryconfiguration (and material selection thereof), the accessory 3520 maybe made of a nylon-based material.

The accessory 3520 may have an attachment backing 3521, which may be ofminimal thickness and generally polygonal in shape. The backing 3521 maybe configured for releasable attachment to the rear face 3411. In thisrespect, the backing 3521 may have one or more apertures (not viewablehere) for receiving a respective attachment fastener 3528 therethrough.As shown, there may be a fastener 3528 inserted through four cornerapertures. Accordingly, the second portion 3400 may also havereceptacles (not viewable here) that align with the apertures, to whichthe fastener 3528 may be securely positioned therein. In aspects, thefasteners 3528 may be screwed into the second portion 3400.

It may be desirous to attach and detach the accessory 3520 withouthaving the jeopardize the integrity of the assembled enclosure 3200.Thus, the receptacles need not have a depth that extends all the waythrough the thickness of the second portion 3400. Accordingly, thesecond portion 3400 may have various raised faces 3530 to accommodateand appreciable amount of material depth to which the fastener 3528 mayextend.

In other aspects, it may be desirous to disassemble the enclosure 3200without removing the accessory 3520. Thus, the accessory 3520 may beshaped in a manner to provide access to enclosure fasteners 3511. Asshown, the accessory 3520 may have one or more arcuate segments 3527.

The accessory 3520 may have a hand hold strap 3522. The strap 3522 maybe movably, yet fixedly connected at strap attachment point 3525. Whilenot meant to be limited to any particular hand hold configuration, thehand hold strap 3522 may be of sufficient length for inserting into aneyelet 3524, and then wrapping back over for self-securing to itself,such as via a Velcro layer (e.g., a mini-hook/loop) 3526. The layer 3526may be of suitable size to provide adjustment for accommodation of handsof various sizes, as would be apparent to one of skill in the art.

As shown in FIG. 13C, a user 3532 can slide his/her hand into thehand-insertion region 3523. Using the hand on the back of the enclosure3520 may provide extra stability as the user 3532 interfaces with themobile device via outer touchscreen 3302.

For further convenience, a carrying handle 3530 may be coupled to theenclosure 3200. As illustrated in FIG. 13A, the handle 3530 may becoupled to the second portion 3400 via handle couplers 3529 on each sideof the handle.

Referring now to FIGS. 14A and 14B together, a top view of a magneticattachment accessory releasably coupled to a rear side of an explosionproof assembly and a side view of a user using the explosion proofassembly of FIG. 14B while magnetically attached to a surface,respectively, in accordance with embodiments disclosed herein, areshown.

While it need not be exactly the same, an assembly 4000 may be like thatof any assembly disclosed herein, and components thereof may beduplicate or analogous. Thus, only a brief discussion of the assembly4000 is provided, recognizing that differences, if any, would bediscernable by one of skill in the art, especially in view of thepresent disclosure.

As illustrated, explosion proof assembly 4000 may include a mobiledevice (not shown here) associated with a flame extinguishing enclosure4200. The enclosure 4200 may include a first or upper portion 4300configured for releasable coupling to a second or lower portion 4400.

To aid in use of the assembly 4000, various accessories may be utilized,including those that provide additional grip, shock absorption,hand-holding, and the like. As shown in FIGS. 14A-14B, magneticattachment accessory 4520 may be coupled to the assembly, such as to therear side 4411 of the second portion 4400.

Although not limited to any particular accessory configuration (andmaterial selection thereof), the accessory 4520 may include variousmagnetic and non-magnetic components coupled together. As shown in theFigures, the accessory 4520 may include at least on non-magnetic supportbar 4532 coupled to raised faces 4531. The support bar 4532 may have agenerally rectangular prism shape

The backing support bar(s) 4532 may be configured for releasableattachment to the rear face 4411. In this respect, the support bar 4532may have one or more apertures (partially viewable here) for receiving arespective attachment fastener 4528 therethrough. As shown, there may bea fastener 4528 inserted through apertures on each end of the supportbar 4532. Accordingly, the second portion 4400 may also have receptacles(not viewable here) that align with the apertures, to which the fastener4528 may be securely positioned therein. In aspects, the fasteners 4528may be screwed into the second portion 4400.

Although a magnet 4544 may be directly coupled to the rear face 4411,the Figures show the magnet 4544 coupled onto the support bar 4532. Inaspects, there may be a first magnet on one end of the support bar 4532,and a second magnet disposed on the opposite end of the support bar. Another side of second portion 4400 may have a similar support bar/magnetconfiguration (e.g., a support bar 4532 on each side, and a magnet oneach end of the respective support bar).

It may be desirous to attach and detach the accessory 4520 withouthaving the jeopardize the integrity of the assembled enclosure 4200.Thus, the receptacles need not have a depth that extends all the waythrough the thickness of the second portion 4400. Accordingly, thesecond portion 4400 may have various raised faces 4531 to accommodateand appreciable amount of material depth to which the fastener 4528 mayextend and engage therein. As shown the presence of the raised faces4531 may provide suitable clearance 4533 so that the support bar 4532does not come into inadvertent contact with enclosure fasteners 4511.

As shown in FIG. 14B, a user 4532 may magnetically attach the assembly4000 to a suitable surface, which may provide extra stability as theuser 4532 interfaces with the mobile device via outer touchscreen 4302.Moreover, the user 4532 is now relieved of having to use one hand tohold the assembly 4000.

For further convenience, a carrying handle 4530 may be coupled to theenclosure 4200. The handle 4530 may be coupled to the second portion4400 via handle couplers 4529 on each side of the handle.

Advantages.

Previously operators/users would not be allowed to carry an electronicmobile device with them into hazardous areas (C1D2/Zone2/Zone2/Zone1) asthere was no guaranty these devices will not create a spark (i.e.,explosion). So they were using pen and paper to do their job(inspection, maintenance, turn arounds, etc.).

Embodiments of the disclosure advantageously provide for an explosionproof assembly that may allow operators/users to now carry their mobiledevices within an explosion proof assembly of the disclosure. Users cannow advantageously and beneficially use customized Apps, take pictures,take videos, and collaborate with their peers, such via Skype or otherApps. Their work is a lot more efficient and is still safe.

While embodiments of the disclosure have been shown and described,modifications thereof can be made by one skilled in the art withoutdeparting from the spirit and teachings of the disclosure. Theembodiments described herein are exemplary only, and are not intended tobe limiting. Many variations and modifications of the disclosurepresented herein are possible and are within the scope of thedisclosure. Where numerical ranges or limitations are expressly stated,such express ranges or limitations should be understood to includeiterative ranges or limitations of like magnitude falling within theexpressly stated ranges or limitations. The use of the term “optionally”with respect to any element of a claim is intended to mean that thesubject element is required, or alternatively, is not required. Bothalternatives are intended to be within the scope of any claim. Use ofbroader terms such as comprises, includes, having, etc. should beunderstood to provide support for narrower terms such as consisting of,consisting essentially of, comprised substantially of, and the like.

Accordingly, the scope of protection is not limited by the descriptionset out above but is only limited by the claims which follow, that scopeincluding all equivalents of the subject matter of the claims. Each andevery claim is incorporated into the specification as an embodiment ofthe present disclosure. Thus, the claims are a further description andare an addition to the preferred embodiments of the disclosure. Theinclusion or discussion of a reference is not an admission that it isprior art to the present disclosure, especially any reference that mayhave a publication date after the priority date of this application. Thedisclosures of all patents, patent applications, and publications citedherein are hereby incorporated by reference, to the extent they providebackground knowledge; or exemplary, procedural or other detailssupplementary to those set forth herein.

What is claimed is:
 1. An explosion proof assembly comprising: a firstportion comprising a first portion rear face, a first portion outeredge, a first portion inner edge, a second dissipation wall, a pinhousing receptacle, and a window; an outer touchscreen adhesively sealedaround a perimeter of the first portion rear face; a second portioncomprising a second portion inner face, a pin housing, a second portioninner surface defined by a second portion inner edge that transitionsinto a first dissipation wall; a mobile device disposed between thewindow and the second portion inner face, the mobile device beingoperable via a mobile device touchscreen; wherein the first portion andthe second portion are releasably coupled to each other to form anenclosure, wherein the pin housing mates within the pin housingreceptacle, wherein upon assembly the outer touchscreen is engaged withand transmissive to the mobile device touchscreen, wherein the seconddissipation wall is adjacent to the first dissipation wall, wherein aportion of the first dissipation wall protrudes into the seconddissipation wall, the portion being square in shape in lateral sidecross section view of the explosion proof assembly; wherein the firstportion comprise a plurality of first mating apertures, wherein thesecond portion comprises a plurality of second mating aperturescorresponding to the plurality of first mating apertures, wherein eachrespective first mating aperture and second mating aperture has afastener disposed therein, wherein upon mating of the first portion andthe second portion, each fastener is tightened to a torque value in therange of 5 Newton-meter to 6 Newton-meter, and wherein when the firstdissipation wall mates with the second dissipation wall it forms acomplete metal-to-metal seal.
 2. The explosion proof assembly of claim1, wherein the mobile device comprises an on-off button, wherein the pinhousing comprises a movable pin, wherein upon assembly the movable pinis aligned with the on-off button, and wherein depressing of the movablepin results in depressing the on-off button.
 3. The explosion proofassembly of claim 2, wherein the first portion comprise a plurality offirst mating apertures, wherein the second portion comprises a pluralityof second mating apertures corresponding to the plurality of firstmating apertures, wherein each respective first mating aperture andsecond mating aperture has a fastener disposed therein, wherein eachfastener is tightened to a torque value in the range of 5 Newton·meterto 6 Newton·meter.
 4. The explosion proof assembly of claim 3, whereinthe mobile device is configured for taking photos via a camera lens,wherein the second portion comprises a lens window, and wherein uponassembly the camera lens and the lens window are aligned.
 5. Theexplosion proof assembly of claim 1, wherein the mobile device isconfigured for taking photos via a camera lens, wherein the secondportion comprises a lens window, and wherein upon assembly the cameralens and the lens window are aligned.
 6. The explosion proof assembly ofclaim 5, wherein the mobile device is configured for electromagneticwireless recharging functionality, and wherein the second portioncomprises a second portion window sealingly closed off.
 7. The explosionproof assembly of claim 1, wherein the mobile device is configured forelectromagnetic wireless recharging functionality, and wherein thesecond portion comprises a second portion window sealingly closed off.8. The explosion proof assembly of claim 1, wherein upon coupling theassembly is configured to at least partially dissipate a flame resultantfrom an explosion of the mobile device.
 9. An explosion proof assemblycomprising: a first portion comprising a first portion rear face, afirst portion outer edge, a first portion inner edge, a seconddissipation wall, a pin housing receptacle, and a window; an outertouchscreen adhesively sealed around a perimeter of the first portionrear face; a second portion comprising a second portion inner face, apin housing, a second portion inner surface defined by a second portioninner edge that transitions into a first dissipation wall; a mobiledevice disposed between the window and the second portion inner face,the mobile device being operable via a mobile device touchscreen;wherein the first portion and the second portion are releasably coupledto each other to form an enclosure, wherein the pin housing mates withinthe pin housing receptacle, wherein upon assembly the outer touchscreenis engaged with and transmissive to the mobile device touchscreen,wherein the second dissipation wall is adjacent to the first dissipationwall, wherein a ridged portion of the first dissipation wall protrudesinto the second dissipation wall, wherein the mobile device comprises anon-off button, wherein the pin housing comprises a movable pin, whereinupon assembly the movable pin is aligned with the on-off button, whereindepressing of the movable pin results in depressing the on-off button,and wherein upon coupling the assembly is configured to at leastpartially dissipate a flame resultant from an explosion of the mobiledevice; wherein the first portion comprise a plurality of first matingapertures, wherein the second portion comprises a plurality of secondmating apertures corresponding to the plurality of first matingapertures, wherein each respective first mating aperture and secondmating aperture has a fastener disposed therein, wherein upon mating ofthe first portion and the second portion, each fastener is tightened toa torque value in the range of 5 Newton-meter to 6 Newton-meter, andwherein when the first dissipation wall mates with the seconddissipation wall it forms a complete metal-to-metal seal.
 10. Theexplosion proof assembly of claim 9, wherein the mobile device isconfigured for taking photos via a camera lens, wherein the secondportion comprises a lens window, and wherein upon assembly the cameralens and the lens window are aligned, and wherein the ridged portion issquare-shaped in lateral cross-section.
 11. The explosion proof assemblyof claim 10, wherein the first portion comprise a plurality of firstmating apertures, wherein the second portion comprises a plurality ofsecond mating apertures corresponding to the plurality of first matingapertures, wherein each respective first mating aperture and secondmating aperture has a fastener disposed therein, and wherein eachfastener is tightened to a torque value in the range of 5 Newton·meterto 6 Newton·meter.
 12. The explosion proof assembly of claim 11, whereinthe mobile device is configured for electromagnetic wireless rechargingfunctionality, and wherein the second portion comprises a second portionwindow sealingly closed off.
 13. The explosion proof assembly of claim9, wherein the mobile device is configured for electromagnetic wirelessrecharging functionality, and wherein the second portion comprises asecond portion window sealingly closed off.
 14. An explosion proofassembly comprising: a first portion comprising a first portion rearface, a first portion outer edge, a pin housing receptacle, a firstportion inner edge, a second dissipation wall, and a window; an outertouchscreen adhesively sealed around a perimeter of the first portionrear face; a second portion releasably coupled to the first portion toform an enclosure, the second portion further comprising a pin housing,a second portion inner surface defined by a second portion inner edgethat transitions into a first dissipation wall extending substantiallytherearound, and a third dissipation wall; and a mobile device disposedwithin the enclosure, the mobile device being operable via a mobiledevice touchscreen; wherein the pin housing mates within the pin housingreceptacle, wherein upon coupling the outer touchscreen is transmissiveto the mobile device touchscreen of a touch actuation signal madethereon, wherein the mobile device comprises an input connector, whereinthe mobile device comprises an on-off button, wherein the pin housingcomprises a movable pin, wherein upon assembly the movable pin isaligned with the on-off button, and wherein depressing of the movablepin results in depressing the on-off button; wherein the first portioncomprise a plurality of first mating apertures, wherein the secondportion comprises a plurality of second mating apertures correspondingto the plurality of first mating apertures, wherein each respectivefirst mating aperture and second mating aperture has a fastener disposedtherein, wherein upon mating of the first portion and the secondportion, each fastener is tightened to a torque value in the range of 5Newton-meter to 6 Newton-meter, and wherein when the first dissipationwall mates with the second dissipation wall it forms a completemetal-to-metal seal.
 15. The explosion proof assembly of claim 14,wherein the first portion comprise a plurality of first matingapertures, wherein the second portion comprises a plurality of secondmating apertures corresponding to the plurality of first matingapertures, wherein each respective first mating aperture and secondmating aperture has a fastener disposed therein, wherein each fasteneris tightened to a torque value in the range of 5 Newton·meter to 6Newton·meter.
 16. The explosion proof assembly of claim 14, wherein themobile device is configured for taking photos via a camera lens, whereinthe second portion comprises a lens window, and wherein upon assemblythe camera lens and the lens window are aligned.
 17. The explosion proofassembly of claim 16, wherein upon coupling the assembly is configuredto at least partially dissipate a flame resultant from an explosion ofthe mobile device prior to any portion of the flame exiting theassembly.
 18. The explosion proof assembly of claim 17, wherein themobile device is configured for electromagnetic wireless rechargingfunctionality, and wherein the second portion comprises a second portionwindow sealingly closed off.